Planning Fallacy
Planning Fallacy is a formal term confirming that humans are - by nature - horrible at planning. The further out the planning horizon, the worse the prediction. Optimism bias, low-balling to gain project approval and just the fact humans can't predict the future all reinforce the need for the small increment, inspect and adapt feedback loop mindset of Agile. Heres some intriguing info from our friends at Freakonomics on the subject... Why Are Your Projects Always Late (And over budget)? http://freakonomics.com/podcast/project-management/
